Circular Track to launch Rockets into Space?

The U.S. Air Force is researching a new technology that would use magnets to accelerate satellites and other projectiles into space with a gigantic, circular track.
In theory a satellite, or possibly an intercontinental weapon, would be placed on large-scale circular track and gradually accelerated by magnets until its launch at the end of a [...]

10 Things your science teacher was wrong about

Water IS blue, not just because of the sky
Many believe that lakes and oceans are blue “only” because they reflect the blue sky. Actually water looks blue because water is blue; the water molecules do absorb some light, and they absorb red frequencies more than blue. The effect is small, so the blue color only [...]